Feed-water heater and purifier.



No. 629,723. Patented July 25, I899. G. W. LAUGHTON. FEEDWATEB' HEATERAND PURIFIER.

(Application filed Oct. 31, 1898.]

(No Model.)

ATTORNEYS.

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UNITED STATES" PATENT Grinch.

GEORGE W. LAUGHTON, OF NEWYORK, N. Y.

FEED-WATER HEATER AND PURIFI ER.

SPECIFICATION forming part of Letters Patent No. 629,723, dated July 25,1899; Application filed. October 31, 1898. Serial No. 694,989. (Nomodel.)

T0 Ml whom it may concern:

Be it known that I, GEORGE W. LAUGHTON, a citizen of the United States,residing in the city of New York, in the borough of Manhattan and Stateof New York, have invented certain new and useful Improvements inFeed-Water Heaters and Purifiers, of which the following is aspecification.

The object of this invention is to furnish an improved feed-Water heaterand purifier to be used in connection with an ordinary steam-boiler inwhich the well-known surface-blow is made use of to remove the greaseand other impurities accumulated as a scum on the surface of the waterin the boiler and the surface steam blow conducted through a system oftubes through which the feed-water is also passed on its way to theboiler, so that the heat of the surface-blow raises the temperature ofthe feed-water to nearly boiler temperature, while suitablefiltering-chambers are interposed at suitable points to remove thegrease in the surfaceblow and the impurities and scale-forming matter inthe feed-Water before the water is fed into the boiler. For this purposethe invention consists of an improved feed-water heater and purifierwhich comprises, in combination with a steam-boiler and feed-pump, ablow-off pipe terminating at the mean Water-level in the boiler, aheating-chamber connected with the outer end of said blow-off pipe, agrease-extractor connected with said heating chamber, a pipe connectingsaid grease-extractor with the supply-pipe at the suction side of thefeed-pump for the preliminary heating of the feed-water, a feed-waterpipe connected with the force side of the feedpump and passing throughthe heating-chamber, a filtering-chamber connected with the feed-waterpipe, and a pipe leading from the filtering-chamber to the steam-boiler,as will be more fully. described hereinafter.

The accompanying drawing represents a vertical longitudinal section ofmy improved feed-water heater and purifier, showing the steam-boilerlikewise in vertical longitudinal section and the feed-pump in sideelevation.

Referring to the drawing, A represents a steam-boiler of any approvedconstruction. In the steam-boiler is arranged a vertical blowoff pipe B,which passes through the shell of the steam boiler and the upper end ofwhich is on a level with the mean water-level of the boiler. Below thesteam-boiler is arranged a cylindrical chamber 0, which is connectedwith the lower end of the blow-0E pipe B, said chamber being providedwith tightly-packed heads 0, having stuffing-boxes d d, through whichextends a feed-water pipe D, one end of which is connected with thesupply-port or force side of the feed-pump 1?, while the opposite end isconnected by a pipe 6 with the lower part of .a filtering-chamber. E.The blow-0E pipe is connected with the cylindrical heating-chamber 0near one head, while a grease-extractor F is connected at its lower partby a pipe f with the chamber 0 near its opposite head. The upper part ofthe greaseextractor F is connected by a pipe F with the feed-watersupply-pipe G at the suction side of the feed-pump P, while the upperpart of the filtering-chamber E is connected by a pipe H with thesteam-boiler A.

The filtering-chamber and grease-extractor are charged with suitablefiltering material, the filtering-chamber with filteringmaterial bywhich the scale-forming substances are removed, while thegrease-extractor E, which is connected with the cylindrical chamber 0,

is chargedwith material by which the oil and.

grease that isremoved from the surface of the water in the boiler iscollected..-

The pressure of the steam on the surface of the water in the boilerforces a certain quantity of water, with the grease that is formed inthe nature of a scum or film on its surface, through the blow-01f pipeBinto the heating-chamber 0, from which the water passes through thegrease-extractor F, which separates the grease and oil from the same.The water passes then to the pipe F and mingles with the feed-water thatis drawn in through the supply-pipe G and suction-pipe S at thesuction-port of the feed-pump P. The feed-Water which is thus mixed withthe hot boiler-water is heated to some extent thereby and then passesthrough the pipe D and is heated therein as it passes through that partof the pipe D which is located within the heating-chamber O. Thishighly-heated 1 water passes then through the filter E, which removesthe scale forming substances, the purified water being then conducted bythe supply-pipe H into the boiler.

The heat of the water forced through the blow-oif pipe under thepressure of the steam in the boiler serves to raise the temperature ofthe feed-water in the pipe D to nearly boiling temperature. It mixeswith the feedwater in the suction-pipe S and feed-pump, the feed-waterentering the suction-pipe in the form of an injector-jet, and after thepreliminary heating in the suction-pipe and pu mp the feed-water isfinally heated in the heatingchamber 0. The grease blown off from theboiler is collected in the grease-extractor F, while the scale-formin gmatter and impurities in the feed-water are collected in thefilteringchamber E, so that the feed-water is supplied in highly heatedand purified form to the boiler.

My improved system of feed-water heating and purifying has the followingadvantages:

First. By employing the surface-blow the boiler is kept free from greaseand other impurities.

Second. By inter-posing the feed water heater between the boiler and thefeed-pump the live steam which would otherwise be lost in blowingofi thegrease from the surface of the water in the boiler is utilized forheating the feed-water.

Third. By interposing the filtering-chain her and the grease-extractorthe boiler is kept free from incrustation for the reason that thescale-forming substances are separated, while the oil is also separatedand collected for use.

Fourth. The feed-water heater and purifier forms a simple andinexpensive addition to the boiler-plant, while it produces aconsiderable saving in fuel not only by supplying feed-water at nearlythe temperature of the water in the boiler, but by removing the scale-"forming substances from the feed-water bepipe terminating in theboiler, a' heatingchamber connected with the outer end of said blow-offpipe, a heating-pipe passing through said chamber to the boiler, agrease-extractor connected with said heating-chamber,a pump, a pipeconnecting the grease-extractor with the feed-water pipe at the suctionside of the pump, and a pipe connecting the force side of the pump withsaid heating-pipe, substantially as set forth.

2. The combination,with a steam-boiler and feed-pump, of a feed-waterheater and purifier, consisting of a blow-off pipe terminating in theboiler, a heating-chamber connected with the outer end of said blow-oh?pipe, a grease-extractor connected with said heatingchamber, a pipeconnecting said grease-extractor with the supply-pipe at the suctionside of the feed-pump for the preliminary heating of the feed-water, afeed-water pipe connected with the force side of the feed-pump andpassing'through the heating-chamber, a filtering-chamber connected withthe feedwater pipe, and a pipe leading from the filter in g-chamber tothe steam-boiler, substantially as set forth.

3. The cornbi nation,with a steam-boiler and a feed-pump for the same,of a feed-water heating-chamber below said steam-boiler,said chamberbeing provided withheads and stu Piing-boxes on said heads,a feed-Waterpipe connected with the force side of the feed-pump and passing throughthe heating-chamber, a blow-off pipe connecting the heating-chamber withthe interior of the boiler, a grease-extractor connected with saidheatingchamber,

